[1977moneypit]

I am probably going to be swaping a 454 into my 77 chevy k10...it has a 400 sb in it right now but has been giving me so many problems....blow by, loss of compression...and i think think the block might even be cracked because of white smoke out of the pipes. My question is will I be able to just swap in the 454 without any fear of trashing the tranny...I have a th350 w/np 203 t-case. I have read abunch of threads saying that you need to beef up the th350 for people that have 600hp big blocks. But, I am not looking to drag my truck, I just figure if im gunna get another motor I might as well go with a big motor that is gunna sound mean. All I plan on doing is just boring out the block to get whatever lip is there and then just go with a basically stock piston, new gaskets and headers. Will this pretty much stock 454 be alright against my new/stock th350?